To solve the following problem: in multilevel conversion equipment, a capacitor series circuit is used in a direct current portion and parts such as semiconductor switches and a reactor are added to the exterior so as to balance the voltages, but this leads to an increase in the size and cost of the equipment.

Power conversion equipment is configured by connecting a capacitor series circuit in parallel with a direct-current power supply. The capacitor series circuit is used as direct-current input and the power conversion equipment outputs alternating-current voltage having three or more potentials in a half-cycle period. A neutral point of an alternating-current load and an intermediate connection point of the capacitor series circuit are directly connected. The voltage of each of the capacitors is detected, and a zero voltage vector obtained by setting each alternating-current output at the same potential is adjusted in accordance with a difference between the voltages.